Central Hydraulics 91020 User manual

Brand: Central Hydraulics

Model: 91020

Category: Motor vehicle accessories & components

Type: User manual

This manual is also suitable for

Life Jacket 91020

TRANSMISSION JACK

1200 LBS. CAPACITY - LOW PROFILE

MODEL 91020

OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http//www.harborfreight.com

2003 by Harbor Freight Tools

manual or any artwork contained herein may be reproduced in any shape or form

without the express written consent of Harbor Freight Tools.

For technical questions, please call 1-800-444-3353.

PRODUCT SPECIFICATIONS

SAVE THIS MANUAL

You will need this manual for the safety warnings and precautions, assembly,

operating, inspection, maintenance and cleaning procedures, parts list and assembly

diagram. Keep your invoice with this manual. Write the invoice number on the inside

of the front cover. Keep this manual and invoice in a safe and dry place for future

reference.

UNPACKING

When unpacking, check to make sure all the parts shown in the Parts List on page

10 are included. If any parts are missing or broken, please call Harbor Freight Tools at the

number shown on the cover of this manual as soon as possible.

SKU 91020 PAGE 2

GENERAL SAFETY WARNINGS AND PRECAUTIONS

1. Keep work area clean and dry. Cluttered, damp, or wet work areas invite

injuries.

2. Keep children away from work area. Do not allow children to handle this

product.

Item Description

Maximum Lifting Capacity 1,200 Pounds.

Overall Dimensions 18-1/2” W x 38” L x 32” H (Fully Raised).

18-1/2” W x 38” L x 8” H (Fully Lowered).

Front & Rear Castors Quantity: 4 / Dimensions: 1-1/4” W x 4” H.

Saddle Block Dimensions 9-1/8” W x 9-1/8” L.

Saddle Side To Side Tilt 12°.

Saddle Forward Tilt 65°.

Pump Lever Rotation 360°.

Lift Range 5-3/4” (Minimum).

31-1/2” (Maximum).

Chain Dimensions 1/4” Thick x 39” Long.

Jack Handle Dimensions 7/8” Diameter x 24” Long.

Release Method Twist Valve Type.

Weight 116 Pounds.

SKU 91020 PAGE 3

3. Store idle equipment. When not in use, tools and equipment should be stored

in a dry location to inhibit rust. Always lock up tools and equipment, and keep out

of reach of children.

4. Do not use this product if under the influence of alcohol or drugs. Read

warning labels on prescriptions to determine if your judgement or reflexes are

impaired while taking drugs. If there is any doubt, do not attempt to use this

product.

5. Use eye and hand protection. Wear ANSI approved safety impact eye goggles,

and safety gloves when using this product. ANSI approved safety impact eye

goggles and safety gloves are available from Harbor Freight Tools.

6. Dress safely. Do not wear loose clothing or jewelry, as they can become caught

in moving parts. Wear a protective hair covering to prevent long hair from be-

coming caught in moving parts.

7. Do not overreach. Keep proper footing and balance at all times to prevent

tripping, falling, back injury, etcetera.

8. Industrial applications must follow OSHA requirements.

9. Stay alert. Watch what you are doing at all times. Use common sense. Do not

use this product when you are tired or distracted from the job at hand.

10. Check for damaged parts. Before using this product, carefully check that it will

operate properly and perform its intended function. Check for damaged parts

and any other conditions that may affect the operation of this product. Replace

or repair damaged or worn parts immediately.

11. Replacement parts and accessories: When servicing, use only

identical replacement parts. Only use accessories intended for use with this

product. Approved accessories are available from Harbor Freight Tools.

12. Maintain this product with care. Keep this product clean and dry during stor-

age for better and safer performance. For your safety, service and maintenance

should be performed regularly by a qualified technician.

13. Use the right equipment for the job. Do not attempt to force small equipment

to do the work of larger industrial equipment. There are certain applications for

which this equipment was designed. It will do the job better and more safely at

the rate for which it was intended. Do not modify this equipment, and do not use

this equipment for a purpose for which it was not intended.

14. WARNING! The warnings, precautions, and instructions discussed in this manual

SKU 91020 PAGE 4

cannot cover all possible conditions and situations that may occur. The operator

must understand that common sense and caution are factors, which cannot be

built into this product, but must be supplied by the operator.

SPECIFIC PRODUCT WARNINGS AND PRECAUTIONS

1. Do not exceed the maximum lift capacity (1200 pounds) for the Transmission

Jack. Overloading the Transmission Jack could cause personal injury and/or property

damage.

2. Use of the Transmission Jack is limited to the removal, installation, and

transportation (in the Jack’s lowered position) of transmissions and

differentials within the weight limitation specified. No alteration to the Jack or

adapters shall be made.

3. Never open or adjust the Bypass Valve. (Noted in Figure A, page 6.) The Bypass

Valve is an essential safety device that is factory-set. Adjusting the Bypass Valve

may cause serious personal injury, property damage, or hinder proper operation of

the Transmission Jack.

4. Make sure the Transmission Jack is used only on a dry, oil/grease free, solid,

level, concrete surface capable of supporting the weight of the entire vehicle,

Transmission Jack, and any additional tools and equipment.

5. Prior to using the Transmission Jack, make sure to read and understand all

warnings, safety precautions, and instructions as outlined in the vehicle

manufacturer’s instruction manual.

6. Do not use the Transmission Jack with the vehicle’s engine running. Also,

make sure to place proper support devices (not included) under the vehicle.

7. Do not allow anyone in the vehicle while using the Transmission Jack.

Keep all bystanders a safe distance away from the vehicle.

8. Never leave the Transmission Jack unattended when the Jack is under a load.

9. Always keep hands, fingers, and feet away from the moving parts of the

Transmission Jack when applying or releasing a load. Remain clear of the

Transmission Jack when raising or lowering a transmission or differential.

10. Always evaluate your task before using the Transmission Jack. The

Transmission Jack is designed to support a transmission or differential as individual

components. Assemblies such as a differential with an axle, or a transmission with

bell housing, can be bulky and difficult to balance on the Jack’s platform or cradle.

SKU 91020 PAGE 5

ASSEMBLY AND OPERATING INSTRUCTIONS

NOTE: For additional references to the parts listed in the following pages, refer to the

Assembly Diagram on page 11.

To Assemble The Handle:

1. Prior to operation, the Handle (36) must be attached to the Transmission Jack.

To do so, loosen the Hex Cap Screw (44) that is located on the Handle Socket

(46). Insert the open end of the Handle fully into the Handle Socket. Then,

firmly retighten the Hex Cap Screw. (See Figure A, next page.)

To Purge The Hydraulic System Of Excess Air:

1. IMPORTANT! Make sure to thoroughly test the Transmission Jack for

proper operation prior to its actual use. If the Transmission Jack appears

Lifting such assemblies, even within the weight limit, can create an off-balance

situation, causing the Transmission Jack to tip over and lead to serious personal

injury and/or property damage. The load should be evenly distributed on the

Transmission Jack, and should not extend beyond the area of the caster wheelbase.

Always use safety straps and/or chains to secure the load.

11. If you are working and the load becomes off-balanced and/or the Transmission

Jack begins to tip over, DO NOT attempt to catch or lift the Jack when it is

falling. In this event, clear the area as quickly and safely as possible in order to

avoid injury from the falling load or getting hit with flying fragments.

12. If in doubt about the safety of your project, it is recommended that you have

the work done by a qualified technician familiar with applicable safe practices.

13. Do not use the Transmission Jack as a permanent stand for a transmission or

differential. Use the Transmission Jack only while making repairs. Then, immediately

remove the transmission or differential from the Transmission Jack.

14. Before lowering the Transmission Jack, make sure tools, tool trays, vehicle

parts, and all other equipment are removed from under the Jack.

15. Maintain labels and nameplates on the Transmission Jack. These carry important

information. If unreadable or missing, contact Harbor Freight Tools for a replacement.

SKU 91020 PAGE 6

FIGURE A

FILLER

PLUG

(45)

RELEASE

VALVE

(47)

GREASE

FITTING

(33)

HANDLE

(36)

HEX CAP

SCREW

(44)

HANDLE SOCKET

(46)

not

to be working properly, it may be necessary to

purge

its hydraulic system

of excess air. To do so, remove the Filler Plug (45). Turn the Release Valve (47)

counterclockwise

to its open position. Pump the Handle rapidly numerous times.

The trapped air is pressurized and will be audible when released in this manner.

Once purged of air, check the Oil Chamber and, if necessary, top off the Oil Chamber

with hydraulic oil. Then replace the Filler Plug, and turn the Release Valve

clockwise

to its closed position. Pump the Handle several times, using full, smooth strokes.

The Transmission Jack should now operate properly. If, after purging, the Hydraulic

Jack still does

not

appear to be working properly, do not use the Hydraulic

Jack until it has been repaired by a qualified technician. (See Figure A.)

To Lower A Transmission Onto The Transmission Jack:

1. IMPORTANT! When raising a vehicle, make sure to use a commercial grade lift or

jack fully capable of supporting the weight of the vehicle. Also, read and understand

all safety warnings and precautions as outlined in the manufacturer’s manual for the

lift or jack.

RELEASE

CHECK VALVE

BYPASS VALVE

(DO NOT ADJUST)

3. Once the vehicle is raised and secured, clear the area underneath the vehicle of

people and tools. Then, wheel the Transmission Jack under the transmission.

4. To raise the Saddle Assembly (12) of the Transmission Jack, turn the Release

Valve (47)

clockwise

to its closed position. Pump the Handle, using full, smooth

strokes. (See Figure A.)

5. Stop just below the transmission, and level the Saddle Assembly (12) with the

Forward Adjusting Knob (24) and Side Adjusting Knob (6). Turning the Forward

Adjusting Knob

clockwise

will lift the front of the Saddle Assembly upward, and

turning it

counterclockwise

will return the Saddle Assembly to a level position.

Turning the Side Adjusting Knob

clockwise

will tilt the Saddle Assembly up,

raising the left side. Turning it

counterclockwise

will bring the Saddle Assembly

back to level. (See Figure B.)

SADDLE ASSEMBLY (12)

FORWARD ADJUSTING KNOB (24)

SIDE ADJUSTING KNOB (6)

6. Continue raising the Saddle Assembly (12) up to the transmission to determine

where you will need to adjust the four Fingers (16). All four Fingers need to grip

and make contact with the transmission. (See Figure B.)

7. After determining where the four Fingers (16) need to be set, loosen the Hex Bolt

(14) on each Finger and adjust the Fingers to the proper setting for the transmis-

sion. Then, retighten the Hex Bolts. (See Figure B.)

8. Secure the Chain (13) to the

Chain Bracket

, and wrap the Chain securely around

the transmission. Attach the other end of the Chain to the Hook (17) on the other

side of the Saddle Assembly (12). Then, tighten the Wing Nut (20) on the other

end of the Hook. (See Figure C, next page.)

FIGURE B

FINGER (16)

HEX BOLT (14)

SKU 91020 PAGE 7

2. WARNING! Do not use the Transmission Jack with the vehicle’s engine running.

Make sure to set the emergency brake, use adequate vehicle support stands if

needed, and block the tires opposite the tire(s) being lifted.

CHAIN BRACKET

HOOK (17)

FIGURE C

SADDLE

ASSEMBLY

(12)

WING NUT (20)

(NOT SHOWN)

9. Once you are sure the transmission is secured by the Chain (13), remove the

bolts and other hardware holding the transmission to the chassis.

10. Make sure the area is clear of people and tools, and verify that the transmission

is securely held in place by the Transmission Jack. Then, slowly turn the Release

Valve (47)

counterclockwise

to lower the Transmission Jack to its lowest position

before moving the unit. (See Figure A.)

11. Carefully wheel the Transmission Jack from under the vehicle to perform the

desired maintenance on the transmission.

To Raise The Transmission Back Into Place:

1. After performing the maintenance on the transmission, move the Transmission

Jack under the vehicle so that the transmission is lined up properly with its

connection points.

2. To raise the transmission, turn the Release Valve (47)

clockwise

to its closed

position. Pump the Handle, using full, smooth strokes. (See Figure A.)

3. Guide the transmission into place, and replace the bolts and other hardware to

secure the transmission to the chassis. Double check to make sure the transmis-

sion is securely installed.

SKU 91020 PAGE 8

CONNECT

CHAIN

HERE.

CONNECT CHAIN

4. Loosen the Wing Nut (20) on the Hook (17) to remove one side of the Chain (13).

Move the Chain out of the way, making sure it will not be in the way of the Trans-

mission Jack when it lowers. (See Figure C.)

5. Make sure nobody is close to the Transmission Jack. Slowly turn the Release

Valve (47)

counterclockwise

to lower the Transmission Jack to its lowest

position. Then, wheel the Transmission Jack clear of the vehicle.

(See Figure A.)

INSPECTION, MAINTENANCE, AND CLEANING

1. Before each use, inspect the general condition of the Transmission Jack. Check

for broken or bent parts, loose or missing parts, and any condition that may affect

the proper operation of the product. If a problem occurs, have the problem

corrected before further use.

Do not use damaged equipment.

2. Keep all moving parts of the Transmission Jack well lubricated. Periodically,

lubricate the Grease Fitting (33). (See Figure A.)

3. Change the hydraulic oil at least once every three years. To do so, with the

Transmission Jack fully collapsed remove the Oil Filler Plug (45) at the top of

the Oil Reservoir. Tip the Transmission Jack to allow the old oil to drain out of

the Reservoir completely, and dispose of the old oil in accordance with local

hazardous waste authority regulations. With Transmission Jack upright, com-

pletely fill the reservoir with a high quality hydraulic oil (not included). Then, re-

install the Oil Filler Plug. Make sure to thoroughly test the Transmission Jack

for proper operation prior to its actual use. If the Transmission Jack appears

not

to be working properly, it may be necessary to

purge

its hydraulic

system of excess air.

(See instructions on page 5 and Figure A.)

4. Purge the hydraulic system of air occasionally. Occasionally, the Transmis-

sion Jack will exhibit signs of excessive air in its hydraulic system such as slow

response to pumping, a spongy feeling to the pumping operation, and a general

lack of performance. To purge the hydraulic system of air, open the Release

Valve (never more than two turns). Loosen the Oil Filler Plug (45) just enough for

any air to escape. Then, re-tighten the Release Valve, and slowly pump the

Transmission Jack several times. The trapped air is pressurized and will be

audible when released in this manner. Once purged of air, check the Oil Reser-

voir and, if necessary, top off the Reservoir with hydraulic oil. Then, replace the

Oil Filler Plug, and completely lower the Transmission Jack. Make sure to

thoroughly test the Transmission Jack for proper operation prior to its

actual use. (See Figure A.)

SKU 91020 PAGE 9

PARTS LIST

SKU 91020 PAGE 10

PLEASE READ THE FOLLOWING CAREFULLY

THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND

ASSEMBLY DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE

MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF

ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE

PRODUCT, OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE

PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES

THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY

CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER

ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE

ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR

HER INSTALLATION OF REPLACEMENT PARTS THERETO.

NOTE: Some parts are listed and shown for illustration purposes only, and are not

available individually as replacement parts.

Part # Description Qty. Part # Description Qty.

1 Main Frame 1 25 Spring Pin 2

2 Lift Arm 1 26 Forward Pivot (Front) 1

3 Lift Arm Strap 2 27 Bearing 1

4 Front Link 2 28 Forward Pivot (Back) 1

5 Snap Ring 8 29 Channel Nut 1

6 Side Adjuster Knob 1 30 Cotter Pin 1

7 Spacer 1 31 Forward Pivot (Shaft) 1

8 Side Pivot (Front) 1 32 Return Spring 1

9 Hex Nut 2 33 Grease Fitting 1

10 Side Pivot (Back) 1 34 Cotter Pin 1

11 Snap Ring 4 35 Hydraulic Unit 1

12 Saddle Assembly 1 36 Handle 1

13 Chain/Bolt Kit 1 37 Lock Washer 4

14 Hex Bolt 8 38 Hex Cap Screw 4

15 Washer 8 39 Lift Arm Pivot Pin 1

16 Finger 4 40 Hex Cap Screw 16

17 Hook 1 41 Caster 4

18 Stud 1 42 Washer 16

19 Washer 2 43 Lock Nut 16

20 Wing Nut 1 44 Hex Cap Screw 1

21 Hex Nut 1 45 Filler Plug 1

22 Side Pivot Shaft 1 46 Handle Socket 1

23 Saddle Support Assembly 1 47 Release Valve 1

24 Forward Adjuster Knob 1

SKU 91020 PAGE 11

NOTE: Some parts are listed and shown for illustration purposes only, and are not

available individually as replacement parts.

ASSEMBLY DIAGRAM

Central Hydraulics 91020 User manual

Brand: Central Hydraulics

Model: 91020

Category: Motor vehicle accessories & components

Type: User manual

This manual is also suitable for

Life Jacket 91020

Download PDF

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Central Hydraulics 91020 User manual

This manual is also suitable for

Central Hydraulics 91020 User manual

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